1.搭建Django框架
Eclipse/STS
https://spring.io/tools3/sts/legacy
Python SDK
https://www.python.org/getit/
pip安装
若scripts目录为空：
python -m ensurepip 创建出pip3.exe
python -m pip install --upgrade pip --force-reinstall 安装更新
Django安装
pip install Django
2.配置步骤
见操作
3.HELLOWORLD
A.创建视图
MVC框架中的VIEW,创建view.py
from django.http import HttpResponse
def hello(request):
return HttpResponse("Helloworld!")
B.在urls.py文件中添加映射
from . import view
from hellodj.login import login
urlpatterns = [
path('访问路径/', 文件名.函数名)
path('hello/', view.hello),
path('login/', login),
]
4.MYSQL驱动
3.4及以下版本：
pip install MySQLdb
Could not find a version that satisfies the requirement MySQLdb (from
versions: )No matching distribution found for MySQLdb
3.5及以上版本：
PyMySQL 下载地址：https://github.com/PyMySQL/PyMySQL。
C:\Users\Administrator\AppData\Local\Programs\Python\Python38\Scripts
$ pip3 install PyMySQL
https://www.runoob.com/python3/python3-mysql.html
中文处理：
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb4 in position 106:
invalid start byte
访问权限
pymysql.err.OperationalError: (1045, "Access denied for user
'test'@'localhost' (using password: YES)")
#ip+user+pwd+dbname
db = pymysql.connect("localhost","root","","test" )
sql = "select * from users where id="+id
类型转换
TypeError: can only concatenate str (not "int") to str
#sql = "select * from users where id="+id
sql = "select * from users where id="+str(id)
print ("Database version : %s " % data)
TypeError: not all arguments converted during string formatting
<class 'tuple'>: (1, 'hello', 'world', 1, 'aa')
#print ("username : %s " % data)
print ("username : %s " % data[n])
https://www.runoob.com/python/python-tuples.html
print ("username : %s " % str(data[0:]))
5.修改TEMPLATES
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [BASE_DIR+"/templates",], # 修改位置
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
引包
# -*- coding:utf-8 -*-
from django.shortcuts import render
6.模型
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
DATABASES = {
'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
'ENGINE': 'django.db.backends.mysql', # 或者使用
mysql.connector.django
'NAME': 'test',
'USER': 'root',
'PASSWORD': '',
'HOST':'localhost',
'PORT':'3306',
}
}
创建MODEL
C:\Users\Administrator\AppData\Local\Programs\Python\Python38\Scripts
django-admin startapp D:\workspace-sts-3.9.12.RELEASE\hellodj\TestModel
可能的错误：
CommandError: 'D:\workspace-sts-3.9.12.RELEASE\hellodj\TestModel' is not a
valid
app name. Please make sure the name is a valid identifier.
正确的语句：
D:\workspace-sts-3.9.12.RELEASE\hellodj>C:\Users\Administrator\AppData
\Local\Programs\Python\Python38\Scripts\django-admin.exe startapp TestModel
7.添加APP
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]
改为：
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'TestModel',# 添加此项
]
反向生成：
D:\workspace-sts-3.9.12.RELEASE\hellodj>c:\Users\Administrator\AppData
\Local\Programs\Python\Python38\python.exe manage.py inspectdb
可能的错误：
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module.
Did you install mysqlclient?
安装
pip install mysqlclient
D:\workspace-sts-3.9.12.RELEASE\hellodj>c:\Users\Administrator\AppData
\Local\Pro
grams\Python\Python38\python.exe manage.py inspectdb >models.py
（根目录）
